[PATCH v4 net-next 18/19] net: mvpp2: limit minimum ring size to 1024 descriptors

[stefanc]

From: Stefan Chulski <stef...@marvell.com>

To support Flow Control ring size should be at least 1024 descriptors.

Signed-off-by: Stefan Chulski <stef...@marvell.com>
---
 drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c 
b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index 55138c7..bb7dfed 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -4545,6 +4545,8 @@ static int mvpp2_check_ringparam_valid(struct net_device 
*dev,
 
        if (ring->rx_pending > MVPP2_MAX_RXD_MAX)
                new_rx_pending = MVPP2_MAX_RXD_MAX;
+       else if (ring->rx_pending < MSS_THRESHOLD_START)
+               new_rx_pending = MSS_THRESHOLD_START;
        else if (!IS_ALIGNED(ring->rx_pending, 16))
                new_rx_pending = ALIGN(ring->rx_pending, 16);
 
-- 
1.9.1